The three composing parts of the gridconnected solar photovoltaic power station,such as solar panels,grid-connected inverters and lightning protection devices were introduced.

The parallel gap lightning protection device on 35kV overhead transmission lines can prevent insulators and conductors from being burned by power frequency arc caused by lightning stroke.

Based on thoroughgoing study on <Design Standard on Building s Lightning Protection>and designing practice of several years,this paper puts forward some suggestions about the differentiation of environment, utilization of building s reinforcing bars as lightning protection devices, and arrangement of lightning receiver, etc.

The lightning protective principle of lightning arresters is also expounded.

The paper analysised three aspects of proctective grounding,operative grounding and grounding for lightening aiming at the construction pitfall liable to occurrence during the architectural electromechanical instalment.

Combined with the actual condition of comprehensive pipe canal in the group that new city zone in the center of Foshan city,it analyzes and introduces the current supply and distribution system design and grounding for lightening system design of comprehensive pipe canal electrical design in order to perfect and deepens the comprehensive pipe canal electrical design.